JP2000248900A - Tunnel construction equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide equipment for constructing a tunnel with the degree of freedom of an adjusting mechanism for the direction of concrete spray nozzle. SOLUTION: This equipment for tunnel construction comprises a main body 3 of the equipment and a boom 31 provided in the equipment, which can be oscillated in both the horizontal and vertical directions relative to the main body 3 of the equipment. Also, an intermediate oscillating portion 33 oscillating in the vertical direction relative to the boom 31 arranged in the boom 31. Moreover, a concrete spraying nozzle 35 is provided, which is provided in the intermediate oscillating portion 33 and is rotatable around a shaft in the longitudinal direction of the intermediate oscillating portion 33 and also oscillates relative to the intermediate oscillating portion 33. In addition, the intermediate oscillating portion 33 is able to oscillate in the horizontal direction relative to the boom 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel construction apparatus used for constructing a tunnel.

[0002]

2. Description of the Related Art A conventional tunnel construction apparatus having a function for spraying concrete includes an apparatus body, a boom provided on the apparatus body and capable of swinging horizontally and vertically with respect to the apparatus body, and a boom. An intermediate swinging portion that is provided and swingable in a direction perpendicular to the boom; and an intermediate swinging portion that is provided on the intermediate swinging portion and is rotatable around an axis in a longitudinal direction of the intermediate swinging portion. Some include a swingable concrete spray nozzle.

[0003] In such a conventional tunnel construction apparatus, the concrete spray nozzle is positioned at the spray location and the direction of the concrete spray nozzle is adjusted by the following procedure. First, the boom is swung by a predetermined amount in the vertical and horizontal directions with respect to the main body of the apparatus, and the intermediate swinging part is swung by a predetermined amount in the vertical direction with respect to the boom. The provided concrete spray nozzle is positioned at the spray location. Then, in this state, the concrete spraying nozzle is rotated by a predetermined amount around the longitudinal axis of the intermediate swinging portion, and the concrete spraying nozzle is swung (swinged) by a predetermined amount with respect to the intermediate swinging portion. The direction of the concrete spray nozzle was adjusted.

[0004]

However, in the conventional tunnel construction apparatus, the intermediate swinging portion cannot swing horizontally with respect to the boom as described above. Accordingly, the direction of the concrete spray nozzle when the concrete spray nozzle is positioned at the spraying position by adjusting the direction of the boom and the vertical direction of the intermediate swinging portion (for example, the head is precisely straightened with respect to the spray surface) Adjust the direction)
This can only be performed by rotating the concrete spray nozzle about a longitudinal axis of the intermediate swing portion by a predetermined amount, and swinging the concrete spray nozzle with respect to the intermediate swing portion. Therefore, it takes time to work,
The degree of freedom in setting the direction of the concrete spray nozzle was insufficient, as it was difficult.

Accordingly, an object of the present invention is to provide a tunnel construction apparatus in which the degree of freedom of the mechanism for adjusting the direction of the concrete spray nozzle is increased.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the invention according to claim 1 is provided with an apparatus main body and provided on the apparatus main body and capable of swinging in the horizontal and vertical directions with respect to the apparatus main body. A boom, an intermediate swing unit provided on the boom and swingable in a direction perpendicular to the boom, and a boom provided on the intermediate swing unit and rotatable around a longitudinal axis of the intermediate swing unit; And a concrete spray nozzle capable of swinging with respect to the intermediate swinging portion, wherein the intermediate swinging portion is capable of swinging horizontally with respect to the boom. It is characterized.

As a mechanism for swinging the intermediate swinging part in the horizontal direction with respect to the boom, for example, a mechanism using a hydraulic cylinder can be used. Other mechanisms may be used as long as they can be made to work. The intermediate swinging unit may be, for example, a unit integrally provided with a basket for mounting a worker on an upper portion thereof, but may be a portion in which a boom is simply branched.

According to the first aspect of the present invention, since the intermediate swinging portion can swing horizontally with respect to the boom, the direction of the boom and the vertical direction of the intermediate swinging portion are adjusted. Adjusting the direction of the concrete spray nozzle when the concrete spray nozzle is positioned at the spray location (for example, adjusting the direction of the concrete spray nozzle accurately and straightly to the spray surface)
In addition to rotating the concrete spray nozzle about a longitudinal axis of the intermediate swinging portion by a predetermined amount, swinging the concrete spraying nozzle with respect to the intermediate swinging portion, booms the intermediate swinging portion. Swinging in the horizontal direction with respect to is performed as appropriate. That is, the degree of freedom of the mechanism for adjusting the direction of the concrete spray nozzle is increased, and the direction of the concrete spray nozzle can be easily and quickly adjusted.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below with reference to FIGS. 1 is a side view showing a tunnel construction apparatus according to the present invention, FIG. 2 is a plan view showing a tunnel construction apparatus according to the present invention, FIG. 3 is an enlarged plan view showing a main part of the spraying apparatus, and FIG. FIG. 5 is an enlarged side view showing a main part, FIG. 5 is a front view for explaining the operation of the concrete spray nozzle, and FIG. 6 is a schematic plan view for explaining the swinging of the intermediate swinging part with respect to the boom.

[0010] In the tunnel construction apparatus according to the present invention, the intermediate swinging portion provided on the boom so as to be able to swing vertically with respect to the boom of the spraying device is also capable of swinging horizontally with respect to the boom. The main feature is that the degree of freedom of the mechanism for adjusting the direction of the concrete spray nozzle provided in the intermediate swinging part is increased.

First, as shown in FIGS. 1 and 2, a tunnel construction apparatus 1 according to the present invention includes a vehicle body (apparatus main body) 3 moved by wheels 2,..., And a driver seat 4 provided on the vehicle body 3. A steering wheel 5, a step 6, a cable reel 7 wound with a cable 7a for power supply, a counterweight 8, for balancing the vehicle body 3,
, And outriggers 9, for stabilizing the vehicle body 3.

Drilling devices 20L and 20R are provided on both left and right sides of the front portion of the vehicle body 3. The base end of the boom 21 of the drilling device 20L is pivotally supported at the front left side of the vehicle body 3, and can swing freely at a predetermined angle in the vertical direction about the base end. At the tip of the boom 21, an intermediate swing portion 23 is provided so as to freely swing at a predetermined angle in the vertical direction and the horizontal direction with respect to the boom 21. Further, a drifter 25 is provided on a side portion of the intermediate swing portion 23 so as to freely swing at a predetermined angle in the horizontal direction with respect to the intermediate swing portion 23. The drifter 25 is provided with a rod 26 for drilling by rotation and impact, and a bit 27 is provided at the tip of the rod 26. Drilling device 20R
Has the same configuration as the hole drilling device 20L and is substantially the same as that of the hole drilling device 20L, and a detailed description thereof is omitted.

In the center of the front part of the vehicle body 3, there is provided a spraying device 30, which is a main component of the tunnel construction device 1.

The boom 31 of the spraying device 30 has its base end pivotally supported at the center of the front of the vehicle body 3, and can swing at predetermined angles in the vertical and horizontal directions with the base end as a fulcrum. Has become. An intermediate swinging portion 33 is provided at the tip of the boom 31, and a basket 36 is provided above the intermediate swinging portion 33 integrally with the intermediate swinging portion 33.

The intermediate oscillating portion 33 is capable of oscillating at a predetermined angle in the vertical direction with respect to the boom 31 like a normal spraying device, and additionally includes a hydraulic cylinder. By being provided, swinging at a predetermined angle is also configured freely in the horizontal direction (see FIGS. 2, 3, and 6).

A concrete spray nozzle 35 is provided below the intermediate swinging part 33 via a shaft 34 projecting forward. The concrete spray nozzle 35 is rotatable around the axis of the shaft portion 34 (around the longitudinal axis of the intermediate swing portion 33), and
4 (intermediate swing part 33) can swing freely by a predetermined angle (see FIGS. 3 and 4). Furthermore, as shown in FIG. 4, the blowing nozzle 35 can be moved back and forth by sliding the shaft portion 34 in and out. A compressor 10 is provided at a rear portion of the vehicle body 3 in order to blow out the sprayed concrete from the concrete spray nozzle 35 of the spray device 30.

The tunnel construction work using the tunnel construction apparatus 1 according to the present invention configured as described above will be described.
This will be described below.

First, the tunnel construction device 1 is moved to a predetermined drilling position by driving the wheels 2,..., And the tunnel construction device 1 is positioned using the outriggers 9,. Then, the booms 21, 21 and the like of the drilling devices 20L, 20R are appropriately operated to drill holes in the drilling surface by rotation and hitting by the drifters 25, 25 to form holes. It blasts by filling, and the sediment generated by blasting is dislodged. Further, a drilling device 20L. With the 20R, a support with H-shaped steel will be provided at the face position after blasting to stabilize the ground.

Thereafter, a concrete spraying operation is performed on the sprayed surface by the spraying device 30. The specific operation of the spray device 30 at this time is as follows. First, the boom 31 is swung in the vertical direction and the horizontal direction by a predetermined amount to adjust the direction of the boom 31 and the vertical direction of the intermediate swing portion 33 to adjust the concrete spray nozzle 35 to the spraying point. (Nearby). Further, the concrete spray nozzle 35 is projected forward by extending the shaft portion 34. Further, the intermediate swing unit 3
By swinging the concrete spray nozzle 3 horizontally with respect to the boom 31 by a predetermined amount, the concrete spray nozzle 35 also swings integrally with the intermediate swing part 33 with respect to the boom 31, and the concrete spray nozzle 35 is moved in a desired direction ( For example, it is adjusted so as to be directed straight to the spraying surface (see FIG. 6). If necessary, the concrete spray nozzle 3
5 is rotated around the longitudinal axis of the intermediate swinging portion 33 by a predetermined amount, and the concrete spray nozzle 35 is swung with respect to the intermediate swinging portion 33. The direction of the spray nozzle 35 may be finely adjusted as appropriate. The method of adjusting the direction of the concrete spray nozzle 35 described here is merely an example, and the concrete spray nozzle is rotated by a predetermined amount around the longitudinal axis of the intermediate swinging part according to the situation, The swinging of the concrete spraying nozzle with respect to the intermediate swinging portion and the swinging of the intermediate swinging portion in the horizontal direction with respect to the boom can be performed in any manner by appropriately selecting them.

After the direction of the concrete spray nozzle 35 is adjusted as described above, the spray concrete urged by the compression force of the compressor 10 is applied to the spray surface. In addition, while the rocking of the boom 31 and the like is sequentially performed as described above, the spraying concrete is applied to the entire spraying surface while adjusting the position and the direction of the concrete spraying nozzle 35.

As described above, according to the tunnel construction apparatus according to the present invention, the intermediate swing unit 33 can swing horizontally with respect to the boom 31. Therefore, when the direction of the boom 31 and the vertical direction of the intermediate swinging portion 33 are adjusted to position the concrete spraying nozzle 35 at the spraying position, the direction of the concrete spraying nozzle 35 is adjusted by the intermediate swinging of the concrete spraying nozzle 35. In addition to rotating by a predetermined amount around the longitudinal axis of the moving part 33 and swinging the concrete spray nozzle 35 with respect to the intermediate swinging part 33, the intermediate swinging part 33 is moved with respect to the boom 31. The swinging in the horizontal direction can be performed by appropriately selecting. That is, the degree of freedom of the mechanism for adjusting the direction of the concrete spray nozzle 35 is increased, and the direction of the concrete spray nozzle 35 can be easily adjusted in a short time.

In the above embodiment, the wheels 2,
By having the (wheel type) running function by ...
It has the advantage that it can move freely in the tunnel and does not require a track. However, if it has a traveling function, it may be a crawler type or a platform that can travel on the track. May be used. Further, the traveling function is not an essential configuration, and may be a configuration without the traveling function (for example, a device mounted on a device having the traveling function).

Further, by providing both the drilling device and the spraying device, the drilling device can immediately perform the spraying operation by the spraying device after performing the drilling operation by the drilling device. In the case where the spraying device is separate, even in a narrow tunnel where a place for replacing the drilling device and the spraying device cannot be secured, the drilling operation and the spraying operation can be performed almost continuously. Even in the case of ground with unstable soil, spraying can be performed immediately after drilling, preventing the problem that the ground collapses due to an interval between drilling and spraying. The tunnel construction device according to the present invention is not limited to this, but has a configuration in which it is possible to reduce costs because it has both a drilling device and a spraying device. Equipped It may be of.

Further, although a hydraulic cylinder is used as a mechanism for swinging the intermediate swing portion, other mechanisms may be used. Further, other specific detailed structures can be appropriately changed without departing from the gist of the present invention.

[0025]

According to the tunnel construction apparatus according to the first aspect of the present invention, the intermediate swinging portion can swing horizontally with respect to the boom. In addition to rotating the spraying nozzle by a predetermined amount around the longitudinal axis of the intermediate swinging part, swinging the concrete spraying nozzle with respect to the intermediate swinging part, and moving the intermediate swinging part with respect to the boom The swinging in the horizontal direction can be performed by appropriately selecting. In other words, the degree of freedom of the mechanism for adjusting the direction of the concrete spray nozzle increases,
The direction of the concrete spray nozzle can be easily adjusted in a short time.

[Brief description of the drawings]

FIG. 1 is a side view showing a tunnel construction apparatus according to the present invention.

FIG. 2 is a plan view showing a tunnel construction apparatus according to the present invention.

FIG. 3 is an enlarged plan view showing a main part of the spraying device.

FIG. 4 is an enlarged side view showing a main part of the spraying device.

FIG. 5 is a front view for explaining the operation of the concrete spray nozzle.

FIG. 6 is a schematic plan view for explaining swing of an intermediate swing unit with respect to a boom.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tunnel construction apparatus 3 Device main body (body) 31 Boom 33 Intermediate swing part 35 Concrete spray nozzle

Claims (1)

[Claims] 1. An apparatus main body, a boom provided on the apparatus main body and swingable in a horizontal direction and a vertical direction with respect to the apparatus main body, and provided on the boom and swingable in a vertical direction with respect to the boom. An intermediate oscillating portion, a concrete spray nozzle provided on the intermediate oscillating portion, rotatable around a longitudinal axis of the intermediate oscillating portion, and capable of oscillating with respect to the intermediate oscillating portion. , Wherein the intermediate swinging part is capable of swinging in a horizontal direction with respect to the boom.